ID-based control unit-key fob pairing

Abstract

A method for pairing a key fob with a vehicle is provided. A pairing device and a key fob execute an ID authenticated key agreement protocol based on a KFID to authenticate one another and to generate an encryption key DHKey 1 . The pairing device encrypts a control unit identification (CUID) with DHKey 1 . The pairing device transmits the encrypted CUID to the key fob. The key fob and a control unit executes an ID authenticated key agreement protocol based on the CUID to authenticate one another and to generate an encryption key DHKey 2 . The control unit encrypts an operation key with DHKey 2 and transmits the encrypted operation key to the key fob.

What is claimed is: 
     
       1. A method for pairing a key fob with a vehicle, comprising:
 executing, by a pairing device and the key fob, an identification (ID) authenticated key agreement protocol based on a key fob identification (KFID) to authenticate one another and to generate a first encryption key; 
 encrypting, by the pairing device, a control unit identification (CUID) with the first encryption key; 
 transmitting, by the pairing device, the encrypted CUID to a key fob; 
 executing, by the key fob and a control unit, an ID authenticated key agreement protocol based on the CUID to authenticate one another and to generate a second encryption key; 
 encrypting, by the control unit, an operation key with the second encryption key; and 
 transmitting, by the control unit, the encrypted operation key to the key fob. 
 
     
     
       2. The method of  claim 1 , further comprising:
 inserting the CUID into a storage device of the control unit; and 
 transmitting the CUID to a vehicle dealer. 
 
     
     
       3. The method of  claim 1 , further comprising:
 inserting a unique ID into the key fob (KFID). 
 
     
     
       4. The method of  claim 1 , further comprising reading the KFID of the key fob.